History Photographed on Instagram: "On September 11, 2001, NYPD helicopters flew around the Twin Towers searching for survivors on the rooftops.⁠ ⁠ They hoped to rescue people trapped above the fire, but intense smoke, extreme heat, and locked roof doors made it impossible.⁠ ⁠ Pilots couldn’t land or hover safely due to poor visibility and dangerous conditions.⁠ ⁠ No rooftop rescues happened that day, despite their best efforts.⁠ ⁠ The footage from that mission remains one of the most haunting s